(could be double post - if so delete this, their is something wrong here. after submitting a topic or reply i see the post but with no contents)

i just made my first steps with birt charting api. i created some stacked and not-stacked (grouped) bar charts, but i need also a mix of them: some of the bar series should be stacked and some of the should be grouped. how to achieve this?

(setting some but not all series to bs1.setStacked(true); yields an exception ... contains a mix of stacked and unstacked series.)